The "WA" in the filename confirms this video was received or sent through WhatsApp .
The numbers "20201122" indicate the file was created or saved on November 22, 2020 .
"0001" means this was the first WhatsApp video saved to the device's storage on that specific day. What the File Tells Us
If you were to look for this on a phone, it would typically be found in the WhatsApp/Media/WhatsApp Video/ folder. Why do people search for this?
When you share a video on WhatsApp, the app compresses the file and renames it. The original name given by the phone's camera (like "IMG_1234") is lost.